package com.tanhua.dubbo.api;

import cn.hutool.core.collection.CollUtil;
import com.tanhua.model.enums.CommentType;
import com.tanhua.model.mongo.Comment;
import com.tanhua.model.mongo.CommentLike;
import com.tanhua.model.mongo.Movement;
import org.apache.dubbo.config.annotation.DubboService;
import org.bson.types.ObjectId;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Sort;
import org.springframework.data.mongodb.core.FindAndModifyOptions;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.data.mongodb.core.query.Update;

import java.util.List;

@DubboService
public class CommentApiImpl implements CommentApi {

    @Autowired
    private MongoTemplate mongoTemplate;

//分页查询
    @Override
    public List<Comment> findComments(String movementId, CommentType commentType, Integer page, Integer pagesize) {
        //1、构造查询条件
        Query query = Query.query(Criteria.where("publishId").is(new ObjectId(movementId)).and("commentType")
                        .is(commentType.getType()))
                .skip((page -1) * pagesize)
                .limit(pagesize)
                .with(Sort.by(Sort.Order.desc("created")));
        //2、查询并返回
        return mongoTemplate.find(query,Comment.class);
    }

    //发布评论，并获取评论数量
    @Override
    public Integer save(Comment comment) {
        //1、查询动态
        if(comment.getPublishId() != null){
            Movement movement = mongoTemplate.findById(comment.getPublishId(), Movement.class);
            //2、向comment对象设置被评论人属性
            if(movement != null) {
                comment.setPublishUserId(movement.getUserId());
            }
            //3、保存到数据库
            mongoTemplate.save(comment);
            Query query = Query.query(Criteria.where("id").is(comment.getPublishId()));
            Update update = new Update();
            if(comment.getCommentType() == CommentType.LIKE.getType()) {
                update.inc("likeCount",1);
            }else if (comment.getCommentType() == CommentType.COMMENT.getType()){
                update.inc("commentCount",1);
            }else if(comment.getCommentType() == CommentType.LOVE.getType()){
                update.inc("loveCount",1);
            }
            FindAndModifyOptions options = getFindAndModifyOptions();
            Movement modify = mongoTemplate.findAndModify(query, update, options, Movement.class);
            //5、获取最新的评论数量，并返回
            return modify.statisCount(comment.getCommentType() );
        }
        else{
            //3、保存到数据库
            mongoTemplate.save(comment);
            Query query = Query.query(Criteria.where("id").is(comment.getId()));
            Update update = new Update();
            update.inc("likeCount",1);
            FindAndModifyOptions options = getFindAndModifyOptions();
            Comment modify = mongoTemplate.findAndModify(query, update, options, Comment.class);
            //5、获取最新的评论数量，并返回
            return modify.getLikeCount();
        }
    }

    private static FindAndModifyOptions getFindAndModifyOptions() {
        //设置更新参数
        FindAndModifyOptions options = new FindAndModifyOptions();
        options.returnNew(true) ;//获取更新后的最新数据
        return options;
    }

    //判断comment数据是否存在
    public Boolean hasComment(String movementId, Long userId, CommentType commentType) {
        Criteria criteria = Criteria.where("userId").is(userId)
                .and("publishId").is(new ObjectId(movementId))
                .and("commentType").is(commentType.getType());
        Query query = Query.query(criteria);
        return mongoTemplate.exists(query,Comment.class); //判断数据是否存在
    }

    //删除
    public Integer delete(Comment comment) {
        if(comment.getPublishId() != null){
            //1、删除Comment表数据
            Criteria criteria = Criteria.where("userId").is(comment.getUserId())
                    .and("publishId").is(comment.getPublishId())
                    .and("commentType").is(comment.getCommentType());
            Query query = Query.query(criteria);
            mongoTemplate.remove(query,Comment.class);
            //2、修改动态表中的总数量
            Query movementQuery = Query.query(Criteria.where("id").is(comment.getPublishId()));
            Update update = new Update();
            if(comment.getCommentType() == CommentType.LIKE.getType()) {
                update.inc("likeCount",-1);
            }else if (comment.getCommentType() == CommentType.COMMENT.getType()){
                update.inc("commentCount",-1);
            }else {
                update.inc("loveCount",-1);
            }
            //设置更新参数
            FindAndModifyOptions options = getFindAndModifyOptions();
            Movement modify = mongoTemplate.findAndModify(movementQuery, update, options, Movement.class);
            //5、获取最新的评论数量，并返回
            return modify.statisCount(comment.getCommentType() );
        }else{
            //1、删除Comment表数据
            Criteria criteria = Criteria.where("userId").is(comment.getUserId())
                    .and("id").is(comment.getId()).and("commentType").is(comment.getCommentType());
            Query query = Query.query(criteria);
            mongoTemplate.remove(query,Comment.class);
            //2、修改动态表中的总数量
            Query commentQuery = Query.query(Criteria.where("id").is(comment.getId()));
            Update update = new Update();
            update.inc("likeCount",-1);
            //设置更新参数
            FindAndModifyOptions options = getFindAndModifyOptions();
            Comment modify = mongoTemplate.findAndModify(commentQuery, update, options, Comment.class);
            //5、获取最新的评论数量，并返回
            return modify.getLikeCount();
        }

    }

    @Override
    public List<Long> findUserIds(Long userId, CommentType love, Integer page, Integer pagesize) {
        //1、构造查询条件
        Query query = Query.query(Criteria.where("commentType").is(love.getType()).and("publishUserId").is(userId))
                .skip((page -1) * pagesize)
                .limit(pagesize)
                .with(Sort.by(Sort.Order.desc("created")));
        //2、查询并返回
        List<Comment> comments = mongoTemplate.find(query, Comment.class);
        List<Long> userIds = CollUtil.getFieldValues(comments, "userId", Long.class);
        return userIds;
    }

    @Override
    public Boolean hasCommentLike(String commentId, Long userId) {
        Criteria criteria = Criteria.where("userId").is(userId)
                .and("commentId").is(new ObjectId(commentId));
        Query query = Query.query(criteria);
        return mongoTemplate.exists(query, CommentLike.class); //判断数据是否存在
    }

    @Override
    public Integer saveCommentLike(CommentLike commentLike) {
        mongoTemplate.save(commentLike);
        //更新评论表中的点赞数量
        Query query = Query.query(Criteria.where("id").is(commentLike.getCommentId()));
        Update update = new Update();
        update.inc("likeCount",1);
        FindAndModifyOptions options = getFindAndModifyOptions();
        Comment andModify = mongoTemplate.findAndModify(query, update, options, Comment.class);
        //返回最新的点赞数量
        return andModify.getLikeCount();
    }

    @Override
    public Integer deleteCommentLike(CommentLike commentLike) {
        //1、删除CommentLike表数据
        Criteria criteria = Criteria.where("userId").is(commentLike.getUserId())
                .and("commentId").is(commentLike.getCommentId());
        Query query = Query.query(criteria);
        mongoTemplate.remove(query, CommentLike.class);
        //2、修改评论表中的总数量
        Query commentQuery = Query.query(Criteria.where("id").is(commentLike.getCommentId()));
        Update update = new Update();
        update.inc("likeCount",-1);
        FindAndModifyOptions options = getFindAndModifyOptions();
        Comment modify = mongoTemplate.findAndModify(commentQuery, update, options, Comment.class);
        //5、获取最新的评论数量，并返回
        return modify.getLikeCount();
    }

}